Cooler



I Patented Feb. 23, 1932 cooma ANGUS R. GROSS, OF BALTIMORE, llIABYLANDApplication. filed August 7, 1928. Serial No. 297,997.

This invention relates to oil or other coolers for use in coolinglubricating oil or other liquids, and the principal object of theinvention is to provide a cooler, of condenser type,

5 so constructed and assembled that the different elements may bereadily secured in place without the use of screws or bolts; thedifferent elements being soldered together to form a unitary structure.

Another object of the invention is to provide a cooler of'the abovetype, having a maximum cooling surface and capacity, the same having acore of honeycombed units for the passage of the cooling medium, thecore being constructed of substantially tubular units arranged inparallel staggered relation, the units having slightly enlargedpolygonal heads at'each end, and the adjacent faces of the polygonalheads being soldered to ether to prevent passage of liquid between t eadjacent faces of the heads, while permitting the water or other liquidto pass through the units; and the slightly separated tubular bodyportions of the assembled units forming a tortuous passage between thesoldered heads for the fluid to be cooled.

A further object is to provide a cooler in, which the honeycombed coreis first assembled, then slipped into an outer casing and 50 solderedsecurely to it in order to separate the passagesfor the fluid to becooled from the passages for the cooling medium then end plates areplaced over the ends of the outer casing and soldered to the outercasing, suitable inlet and outlet pockets at each end of the casingbeing provided for the cooling medium.

I will explain the invention with reference to the accompanying drawingswhich illus- 40 trate one practical embodiment thereof to-enable othersto adopt and use the same; and

will summarize in the claims the novel features of construction, andnovel combinations of parts, for which protection is desired.

In said drawings I Fig. 1 is a side elevation of the cooler. Fig. 2 is ahorizontal section on the axis of the cooler.

Fig. 3 is an enlarged vertical section 6 through the unit heads.

Fig. 4 is an enlarged vertical section through the bodv of the core.

Fig. 5 is a perspective view of one of the core units.

' Fig. 6 is an end view, partly broken away, '55

of the cooler.

As shown, my novel cooler preferably comprises a honey combed corewithin an outer casing 2, preferably polygonal in cross-section and openat its ends, casing 2 being provided with an inlet 2a and diametricallyopposed outlet 25 of the casing 2 adjacent its center. The ends areenclosed by means of end plates 3 and 4 respectively provided withinlets and outlets 311,411 respectively, said plates having their edgesflanged down around the sides of casing to. End plates 2 and securelysoldered there- 3 and 4 are also provided with means for attaching thecooler to a support such as integral perforated lugs shown at 4?) inFig. 6.

The core 1s preferably built up of a plu- I ralit of sheet metal units111 (Fig.6) (preferab y copper) that of easing 2, said units 1a beingpreferaof length somewhat less than 7 bly substantially circular incross's'ection. The ends of each unit 1a are provided with enlargedpolygonal heads 16 of substantial length, heads 1?) being preferablyexpanded out of the sheet metal body of the units 1a.

A plurality of core units la are assembled in staggered relation, toform a, polygonal core 1 to suit the polygonal cross-section of theouter casing 2, each face of each polygonal head 1?) of the unitscontacting squarely with the opposed faces on the heads of the of thehexagon while water or adjacent .units, and these contacting faces a1heads are securely soldered other cooling medium may be passed freelythrough all the parallel core units 1a, such water or other hquid cannotpass between the soldered contacting faces 16 of the heads and into thespaces around the exterior of the core units, the soldered faces of theheads 11) forming substantial bulkheads tran sversely of the casing 2excepts for the mouths of the units themselves.

previously stat enlarged over ed, the heads 1?) are somewhat thediameter of the tubular body portions of the cores la, thus when thecore is assembled a tortuous passage transversely of the core'around theouter sides of the core units between the soldered heads lb is provided,for a purpose hereinafter set forth.

In assembling the cooler, the honeycombed core is first built up of coreunits la having their enlarged heads 1b soldered together as aboveexplained, the assembled core being of size to suit the size and shapeof the outer casing 2, which casing is preferably a little longer thanthe assembled core. The core is then placed within the casing 2 and theouter faces of the heads 1?) at each end of the core are securelysoldered to the inner walls of the casing 2 entirely around the casingso as to make a water-tight connection. The end plates 3 and 4 withtheir inlets and outlets 3a and 4a are then placed over the ends ofeasing 2 and also securely soldered thereto.

For the three above mentioned soldering steps, I use solders havingsuccessively lower melting points so that each successive soldering stepwill not destroy the one (or ones) previously applied.

By this construction the Water may enter through the inlet 3a and spreadoutinto pocket A between the plate 3 and the adjacent end of the core,and pass through the various core units 1a into the pocket B at theother end of the casing between plate 4 and the adjacent end of thecore; from hence the water may pass through the outlet 4a. The solderedcontacting faces of the polygonal heads 16 of the core units and thesoldered connections of the core to the inner walls of the casing forman effective bulkhead to prevent the entry of water between the heads1?) of the core and into the space around the exterior of the units 1a.

The oil to be cooled may pass through inlet 2a, around the exterior ofthe, core units 1a between the soldered heads lb and out through outlet26. As shown in Fig. 4 a suitable bafile plate 5 may be interposed onthe axis of the core, opposite inlet and outlet 2a and 2b and solderedin place to prevent the oil from passing directly from the inlet to theoutlet, and assisting in spreading the oil so that the entirespace'between heads lb around the 'units 1a will be filled with oilinorder to obtain a maximum cooling effect. Baflle 5 however may beomitted.

By my novel construction a maximum coolmg effect may be obtained as thecore units are made of thin sheet metal which will readily conduct theheat of the oil to the water, also a maximum number of water passagesthrough the core is obtained for a given diameter of casing 2; and theoil in passing through the cooler from inlet 2a to outlet 26 is causedto spread out into relatively thin sheets entirely enveloping the bodyportions of the core units 1a, and the entire space withing and unitedthereto by solder and section.

Obviously the cooler may be used for cooling other liquids and fluidsthan lubricating oil, and I do not so limit the use of the cooler. Nordo I limit my invention to-the exact form shown in the drawings, forobviously changes may be made therein within the scope of the claims Iclaim 1. A cooler, comprising a casing polygonal in cross-section andhaving opposed inlet and outlet connections in the sides thereof; a

preformed honeycombed core within the casing intermediate the endsthereof comprising a plurality of parallel tubular sheet metal coreunits having enlarged expanded heads at their ends corresponding incross-section with that of the casing, the adjacent faces of the,enlarged heads being fluid-tightly soldered together and toy the casing;and end plates having inlet or outlet connections soldered to the endsof the casing.

2. A cooler, comprising'a casing polygonal in cross-section and havingdiametrically opposed inlet and outlet connections in the sides thereof;a preformed honycombed core within the casing intermediate the endsthereof comprising a plurality of parallel tubular sheet metal coreunits having enlarged expanded heads at their ends corresponding incross-section with that of the casing, the adj acent faces of theenlarged heads being fluidtightly soldered together and to the casing;end plates having inlet or outlet connections soldered to the ends ofthe casing, a bafiie plate extending between and soldered to the coreunits opposite the inlet and outlet in the casing sides; and means onthe end plates for attaching the cooler to a support.

3. A cooler, comprising a casing polygonal in cross section, a pluralityof parallel tubes within the casing having enlarged polygonal heads ontheir. ends, said heads being closely fitted together laterally andunited by dipping in solder and the outermost heads being also closelyfitted to the inner wall of the casing, the united heads formingpartitions in the casing adjacent the ends thereof and united thereto bysolder; and heads rovided with flanges fitted over the ends 0 the easrowvided with openings for inlet and outleli of fluid passing through thetubes; said casin having an inlet and outlet intermediate sai partitionsfor the passage of fluid around and exterior of the tubes. 1

4. A cooler, comprising a casing body polygonal in cross section, alurality of parallel tn ular members within t e bod placed side by side,said members having enlarged heads at their ends adjacent the ends ofthe body said heads being closely fitted together laterally, and theoutermost heads being also closely fitted to the inner wall of the bodyso that the head-s form artitions therein adjacent the ends thereof?said tube heads being firmly united to each other and to the walls ofthe casing by dipping in solder; and heads having flanges fitted to theends of the body and secured thereto by solder, said heads closing theends of the body and respectively provided with an inlet and an outletfor fluid to be passed through the tubes; said body having an inlet andan outlet intermediate the said partitions for the passage of fluidaround and exterior to the tubes, all joints being sealed by solder.

ANGUS R. GROSS.

